Re: [PATCH v2] tools/bpf: fix perf build error with uClibc (seen on ARC)
From: Y Song <hidden>
Date: 2019-05-02 20:20:05
Also in:
bpf, linux-perf-users, lkml
On Thu, May 2, 2019 at 8:57 AM Vineet Gupta [off-list ref] wrote:
When build perf for ARC recently, there was a build failure due to lack
of __NR_bpf.
| Auto-detecting system features:
|
| ... get_cpuid: [ OFF ]
| ... bpf: [ on ]
|
| # error __NR_bpf not defined. libbpf does not support your arch.
^~~~~
| bpf.c: In function 'sys_bpf':
| bpf.c:66:17: error: '__NR_bpf' undeclared (first use in this function)
| return syscall(__NR_bpf, cmd, attr, size);
| ^~~~~~~~
| sys_bpf
Signed-off-by: Vineet Gupta <redacted>Acked-by: Yonghong Song <redacted>
quoted hunk ↗ jump to hunk
--- v1 -> v2 - Only add syscall nr for ARC, as asm-generic won't work with arm/sh [Y Song] --- tools/lib/bpf/bpf.c | 2 ++ 1 file changed, 2 insertions(+)diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 9cd015574e83..d82edadf7589 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c@@ -46,6 +46,8 @@ # define __NR_bpf 349 # elif defined(__s390__) # define __NR_bpf 351 +# elif defined(__arc__) +# define __NR_bpf 280 # else # error __NR_bpf not defined. libbpf does not support your arch. # endif --2.7.4